Slackware-current - for both 32-bit and 64-bit architectures (see slackware)

Plus, I have DVD ISO images of slackware-current which are re-generated every time there is an update to slackware-current (I grab my mirror data from http://mirrors.kernel.org/slackware/ or http://slackware.osuosl.org/).
These ISO images do not contain the package source code. This allows me to keep the ISO file size below 2.5 GB.